Question

2. Create a new NetBeans project called PS1Gradebook. Your program will simulate the design of a student gradebook using a two-dimensional array. It should allow the user to enter the number of students and the number of assignments they wish to enter grades for. This input should be used in defining the two-dimensional array for your program. For example, if I say I want to enter grades for 4 students and 5 assignments, your program should define a 4 X 5 array. Your program should allow the user to then enter the appropriate number of grades and store them within the twodimensional array. Your program should include an additional method that will display these values in a matrix form, with the student names on the left and the assignment names as the column header. After displaying the matrix, add a second method that will display each student’s grade average.

Answer 1

import java.util.*;

class Test
{

public static void main (String[] args)
{

String[] name = new String[4];

int[][] assignment = new int[4][5];

int[] gradeAverage = new int[4];

Scanner scan = new Scanner(System.in);
for(int i=0;i<4;i++)
{
System.out.println("Enter name and 5 assignment marks for student "+(i+1)+" : ");
name[i] = scan.next();
for(int j=0;j<5;j++)
{
   assignment[i][j] = scan.nextInt();
}
}

print(name,assignment);

print(name,assignment,gradeAverage);

}

public static void print(String[] name,int[][] assignment)
{
System.out.println("\n\n\nName\tAssignment1\tAssignment2\tAssignment3\tAssignment4\tAssignment5");
for(int i=0;i<4;i++)
{
System.out.print(name[i]+"\t\t");
for(int j=0;j<5;j++)
{
System.out.print(assignment[i][j]+"\t\t");
}
System.out.println();
}
  
}

public static void print(String[] name,int[][] assignment,int[] gradeAverage)
{
     
System.out.println("\n\n\nName\tGrade Average");
for(int i=0;i<4;i++)
{
   gradeAverage[i] = 0;
System.out.print(name[i]+"\t\t");
for(int j=0;j<5;j++)
{
gradeAverage[i]= gradeAverage[i] + assignment[i][j];
  
}
System.out.print(gradeAverage[i]/5);
System.out.println();
}
  
}

}

Output:

Enter name and 5 assignment marks for student 1 : Adams 56 74 75 83 65
Enter name and 5 assignment marks for student 2 : Belk 73 71 76 88 55
Enter name and 5 assignment marks for student 3 : Caan 86 64 78 81 69
Enter name and 5 assignment marks for student 4 : Dunn 66 84 79 65 64



Name    Assignment1     Assignment2     Assignment3     Assignment4     Assignment5
Adams           56              74              75              83              65              
Belk            73              71              76              88              55              
Caan            86              64              78              81              69              
Dunn            66              84              79              65              64              



Name    Grade Average
Adams           70
Belk            72
Caan            75
Dunn            71

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